[jira] [Assigned] (KAFKA-13024) Kafka Streams is dropping messages with null key during repartition

[Matthias J. Sax (Jira)]

 [ 
https://issues.apache.org/jira/browse/KAFKA-13024?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Matthias J. Sax reassigned KAFKA-13024:
---

Assignee: (was: Alex Sorokoumov)

> Kafka Streams is dropping messages with null key during repartition
> ---
>
> Key: KAFKA-13024
> URL: https://issues.apache.org/jira/browse/KAFKA-13024
> Project: Kafka
>  Issue Type: Bug
>  Components: streams
>Affects Versions: 2.8.0, 2.7.1
>Reporter: Damien Gasparina
>Priority: Major
>
> {{KStream.repartition}} is silently filtering messages with null keys. A 
> single topology like {{.stream().repartition().to()}} would filter all 
> messages with null key.
> The cause: we are adding a filter before the source & sink nodes 
> ([https://github.com/apache/kafka/blob/2.8/streams/src/main/java/org/apache/kafka/streams/kstream/internals/KStreamImpl.java#L1060-L1064]).
>  It looks like we are doing that because this method is also used for 
> building KTable.
> Null key messages are valid for a KStream, it looks like a regression, the 
> previous {{.through()}} was not filtering null key messages.



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[jira] [Assigned] (KAFKA-13024) Kafka Streams is dropping messages with null key during repartition

[Aleksandr Sorokoumov (Jira)]

 [ 
https://issues.apache.org/jira/browse/KAFKA-13024?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Aleksandr Sorokoumov reassigned KAFKA-13024:


Assignee: Aleksandr Sorokoumov

> Kafka Streams is dropping messages with null key during repartition
> ---
>
> Key: KAFKA-13024
> URL: https://issues.apache.org/jira/browse/KAFKA-13024
> Project: Kafka
>  Issue Type: Bug
>  Components: streams
>Affects Versions: 2.8.0, 2.7.1
>Reporter: Damien Gasparina
>Assignee: Aleksandr Sorokoumov
>Priority: Major
>
> {{KStream.repartition}} is silently filtering messages with null keys. A 
> single topology like {{.stream().repartition().to()}} would filter all 
> messages with null key.
> The cause: we are adding a filter before the source & sink nodes 
> ([https://github.com/apache/kafka/blob/2.8/streams/src/main/java/org/apache/kafka/streams/kstream/internals/KStreamImpl.java#L1060-L1064]).
>  It looks like we are doing that because this method is also used for 
> building KTable.
> Null key messages are valid for a KStream, it looks like a regression, the 
> previous {{.through()}} was not filtering null key messages.



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